.cover-image {
    width: 100%;       /* 设置图片宽度 */
    height: auto; 
    border: 2px solid #ddd; /* 添加灰色边框 */
    border-radius: 10px; /* 圆角 */
    margin: 0 auto;     /* 水平居中显示 */
}



/* styles.css */
/* styles.css */

body {
    background: linear-gradient(135deg, #87CEEB, #FFFFFF); /* 渐变背景色 */
    color: #333; /* 文字颜色 */

    margin: 0;
    padding: 0;
   

}


.grade-card {
  width: 300px;
  border: 2px solid black;
  border-radius: 10px;
  padding: 20px;
  background-color: #73d412;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
.grade-card p {
  margin: 10px 0;
  font-size: 18px;
}
.grade-card .title {
  font-weight: bold;
  font-size: 20px;
  text-align: center;
  margin-bottom: 10px;
}

.title {
    font-size: 18px;
    font-weight: bold;
}
.count {
    font-size: 36px ;
    text-align: center;
}

/* 课程名称样式 */
.title_course {
  font-size: 18px;
  font-weight: bold;
}


.borrowed-books-table {
    width: 100%;
    border-collapse: collapse;
  }
  
  .borrowed-books-table th, .borrowed-books-table td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: left;
  }
  
  .borrowed-books-table th {
    background-color: #f2f2f2;
    font-weight: bold;
  }
  
  .borrowed-books-table tr:nth-child(even) {
    background-color: #f9f9f9;
  }
  
  .borrowed-books-table tr:hover {
    background-color: #f1f1f1;
  }

